Cosmic rays are atom fragments that rain down on the Earth from outside of the solar system. They blaze at the speed of light and have been blamed for electronics problems in satellites and other machinery. Discovered in 1912, many things about cosmic rays...

(CNN)Scientists have developed a fake rhino horn using horsehair, in a bid to create "credible fakes" to flood the market and reduce demand for the material. rhinoResearchers from the University of Oxford created the synthetic horn by bundling horse hairs, gluing them together with a matrix...

What is the nature of reality? That's not just a question college freshmen ask each other in the wee hours of the morning — it's nagged at people for centuries. At least 25 centuries, in fact, since the philosopher Plato wrote his best-known work, "The Republic," which contains his infamous allegory...

When you think of augmented reality, you probably think of smartphones and video game consoles — the kind of advanced technology that can place an imaginary figure in just the right way to make it appear as if it really exists in your surroundings. In fact, augmented reality is nothing...

At long last, autumn is here! Sweater weather has returned, apples are ready for picking, pumpkins are begging to be carved, and leaves are changing from bright greens to fiery reds, oranges, and yellows. But where do those warm colors come from? Like most things in science,...